i have a 144 gallon tank with tetras and some other middle/bottom feeders. i am planning on a automatic feeder but when i feed my fish flakes, they all stay on top and some of the fish don't get any. i have been putting a pinch in my fingers in the water to get them to sink and the fish love it. is there a good food for tetras and gouramis that will sink a little from an automatic feeder. plan to add discus in future so don't want alot of food sitting on the bottom sand.

The pellets that come in the same containers as the flakes, not the large pellets advertised as sinking food, sink much faster than the flakes. I would imagine some would get through to the middle/bottom feeders.

Sinking foods and algae wafers work well. Flakes and wafers would be a good combo, as the flakes will keep the tetras entertained and the bottom feeders can enjoy the wafers. If your tetras are like mine, they will eat go for the wafers too, so they have to be distracted.